vue3.0 watch 深度监听

vue3.0 watch 设置深度监听

<script>
import { watch } from 'vue';
export default {
  props:["filter"],
  setup(props){
    watch(
      () => {
        return props.filter
      },
      state => {
        getStatistics(state.value)
      },
      { 
        deep:true
        ...
      }
    )
  }
}
</script>